Gas-burner.



No. 637,850, Patented Nov. 28 I899.

A. BUERKLE.

GAS BURNER.

{Application filed Jan. 3, 1899.)

(No Model.)

FIG. I. F158.

A 6' 6 7 is); $7 7 l 3333 4 1 I 4 7 f I -8388 T /0 s v I I! 5 J FIG. .3. E 2 8 I 2 2 x l Y .r WITNESVSES: INVENTOR, 6%. $6. '1 M- NITED STATES PATENT FFICE.

AUGUST BUERKLE, or ALLEGHENY, PENNSYLVANIA.

GAS-BURNER.-

SPECIFICATION forming part of Letters Patent No. 637,850, dated November 28, 1899;

Application filed January 3, 1899- T0 at whom it may conce n;

Be it known that ,1, AUGUST BUERKLE, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Gas- Burners, of Which improvements the following is a specification.

The invention described herein relates to certain improvementsin gas-burners for heating purposes. It has been found that burners in which the gas and air are caused to pass through a wire-gauze or finely-perforated diaphragm are most eiificient, as they insure a more thorough commingling of the gas and air, and it has also been ascertained that the diaphragm should be located as close as practicable to the point of combustion. Hence the diaphragm has generally been so placed that combustion occurs as the gas and air pass through the diaphragm. The combustion on or closely adjacent to the diaphragm will highly heat the latter, so that it is rapidly destroyed, the solid portions between the per forations being burned away. The enlargement of the perforations due to the destruction of the intermediate solid portions permits the gas inside the diaphragm to become ignited and burn in the mixer at the lower end of the burner. This destruction of the diaphragm occurs most rapidly when the flow construct a burner that combustion will occur almost immediately on the passage of the gas and air through the perforated diaphragm; but the flame will not under any conditions come in contact with or in such proximity to the diaphragm as to heat it to any injurious degree.

The invention is herei after more fully described and claimed.

In the accompanying drawings, forming a part of this specificatic 1, Figure 1 is a side elevation of my improved burner. Fig. 2 is a sectional elevation of the same. Fig. 3 is a similar view of a modification.

The burner consists of a shell having a tubular extension provided with inlets for the gas and air. A diaphragm formed of wire- Serial No. 700,953.. (No model.)

row assa e throu h which the as can flow after passing through the diaphragm to the slit or opening between the cover and body of the shell. This passage is made sufficiently narrow to prevent any combustion of gas therein, and the portion of the diaphragm in line with or in such proximity to the slit as to be liable to be heated by the combustion of the gas is made solid or the perforations closed by a portion of the cap or cover.

A desirable form of such burner, and one especially adapted for use in connectionwith automatic Water-heaters, consists of the shell or hollow head 1, cylindrical or of other desired contour in cross-section. The shell is provided with a tubular extension 2, having a bell-shaped lower end, into which projects the gas-nipple 3. The wall of the bell-shaped portion is provided with openings around the nipple for the admission of air. A diaphragm 4, formed of wire-gauze or finely-perforated sheet metal and having a peripheral contour corresponding to that of the head or shell 1, is arranged within the head or shell. The lower end of the diaphragm rests upon and is centered by a seat 5, formed in the lower end of the head. The diaphragm is made of such cross-sectional dimensions that a narrow passage or chamber 10 will be formed between it and the interior wall of the shell or head, adapted to conduct the gas to the narrow slit or outlet 7, formed by the upper edge of the head and the cap or cover 6. This cap or cover is provided on its under side with a projection or annular flange 8, provided with a seat 9 for the reception of the upper end of the diaphragm 4:, which supports the cap or cover the required distance above the upper end of the shell or head. As shown in Fig. 2, the diaphragm may be .made of such a length that its upper end will be flush with or a little below the upper edge of the head or shell, in

which case the projection or flange 9 is extended, so that the cap or cover will be in proper relation to the head when resting on the diaphragm, or the diaphragm may be made somewhat longer than the shell or head, as shown in Fig. 3. The portion of the diaphragm adjacent to the slit or outlet 7 is blank, so that gas will not flow directly to the slit or outlet. This portion of the diaphragm can be made blank or without perforations, as shown in Fig. 3, or can be rendered blank by a diaphragm extension of the flange 8, thereby covering and closing the perforations as against the outlet of gas through this portion of the diaphragm, as shown in Fig. 2.

It is characteristic of my improved burner that the gas and air pass through the diaphragm into the passage or chamber formed by the diaphragm and shell or head and flow thence to the slit or outlet 7, where combustion occurs. As the outlet 7 is located above the passage or chamber, the gas and air will flow freely up to it, and as the chamber or passage 10 is made so narrow that combustion will not occur therein combustion will take place only at the slit or outlet 7 against the blank or imperforate wall of the diaphragm. Hence there is no liability of any enlargement of the perforations and of the consequent ignition of the gas inside the burner.

I claim herein as my invention 1. In a gas-burner, the combination of an imperforate shell and a perforated diaphragm, the diaphragm being arranged in such relation to the shell that the latter extends over a portion of the diaphragm butout of contact therewith, the construction and arrangement of the parts being such that air and gas is prevented from passing through the portion of the diaphragm outside of the shell, sub stantially as set forth.

2. In a gas-burner, the combination of a shell, an annular perforated diaphragm ar ranged within the shell and in close proximity thereto, and a cap or cover closing the upper end of the diaphragm and supported a suitable distance above the shell, so as to form a slit or opening for the escape of gas and air, the construction and arrangement of the parts being such that the gas and air is prevented from passing through the portion of the diaphragm above the shell, substantially as set forth.

3. In a gas-burner, the combination of a shell, and an annular diaphragm having a portion perforated and a portion imperforate or blank, the diaphragm having the end adjacent to the imperforate portion closed and being so arranged Within the shell that the perforated portion thereof is covered by but not in contact with the shell, substantially as set forth.

In testimony whereof I have hereunto set my hand.

AUGUST BUERKLE. Witnesses:

DARWIN S. W OLOOTT, F. E. GAITHER. 

